What is the most populous US state?
California is the most populous US state, with about 39 million people.
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- What was the first skyscraper?
“The Home Insurance Building in Chicago, completed in 1885, is often called the world's first skyscraper.”
Reference: Encyclopaedia Britannica
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What is the longest flight caused by a propane explosion?
A railroad tanker car carrying propane traveled over 3,000 feet when it exploded during a train wreck in Illinois, sheering off a steel tower in it's path. It's the longest flight on record for a propane explosion.
What was the tallest building in the world from 1973 to 1998?
Chicago's Willis Tower, formerly the Sears Tower, was the tallest building in the world from 1973 to 1998.